/*  GStruct: data structure helpers for Java
 *  Copyright (C) 2011 Giulio Franco
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package gstruct.single;

import java.util.Comparator;

/**
 * {@link Comparator} implementation that delegates to the
 * {@link Comparable#compareTo(Object) compareTo()} method of comparable objects. 
 * @author Giulio Franco <giulio_franco@msn.com>
 */
public final class DefaultComparator implements Comparator<Comparable<Object>> {

	private static final DefaultComparator INSTANCE = new DefaultComparator();
	
	private DefaultComparator() { }
	
	@Override
	public int compare(Comparable<Object> o1, Comparable<Object> o2) {
		return o1.compareTo(o2);
	}
	
	@SuppressWarnings("unchecked")
	public static <T extends Comparable<? extends T>> Comparator<T> getInstance() {
		return (Comparator<T>) INSTANCE;
	}
}
